You are in a tough situation. I am not sure how old you are, but when i was in my first year of college, my first love of my life and I broke up after being together for over a year....It was devastating to me. I of course experienced the depression and the mood swings, it was awful. But like you, we had mutual friends. So much so, that his friends became my best friends. So I couldn't possibly cut the ties. Things would have been so different if I would have. In your situation, with being on the same floor in the dorms in the fall, I really do believe you have to prepare yourself this summer, while at the same time, try to get over him.
I do believe you can do both. Maybe taking him off of facebook would be the best thing; but not losing the friends you have? That way it might not be a total culture shock when you see him in the fall?? I wonder if you eliminate everything completely, you will crash so much harder in the fall? I hope I am not confusing you.
Basically if it were me, I would try and just get through the pain (keeping the friends....hearing stories about him, running into him etc) because time DOES heal, and that way by fall I would hope to be in a much better place because I made it through the worst of it????
Take special care of yourself, my heart goes out to you.
Bipolar II, Anxiety/Panic Disorder
Clonazepam .5mg as needed, Methoprazine 6 mg/day, Lexapro 10 mg/day & Lamictal 400 mg/day.